Slidable room assembly

ABSTRACT

A slidable room assembly comprising a vehicle body having an opening formed in an exterior wall and a reciprocable slideout unit or compartment disposed in the opening and slidable between a retracted position and an extended position. Sliding movement of the slideout unit is controlled by means of a drive mechanism that includes rack gear assemblies driven from a drive shaft as described herein. Sliding movement of the slideout unit  24  may be either motor driven or manually powered.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to and the benefit of U.S. ProvisionalApplication No. 61/783,449, filed Mar. 14, 2013, the disclosures ofwhich are incorporated herein in their entirety by reference.

TECHNICAL FIELD

This invention relates to a slidable room assembly, particularly to aslidable room assembly for a vehicle having a slideout room orcompartment that is retracted when the vehicle is in motion and may beextended to afford more room when the vehicle is parked. Moreparticularly, this invention relates to a slidable room assembly thatincludes an improved mechanism for reciprocation of the slideout unitrelative to the vehicle.

BACKGROUND OF THE INVENTION

Recreational vehicles, including motor homes, fifth wheel trailers andtravel trailers may be provided with an extendable slideout unit forincreasing the vehicle's living space. This slideout unit may beextended for use when the vehicle is parked and is retracted in atelescoping manner when the vehicle is to be moved.

Prior vehicle slideout installations that include anextension/retraction system that relies on screws or a pinion foreffecting telescoping movement of the slideout unit relative to thevehicle are known. Screws, in particular, must be short for practicalreasons, including the tendency of a longer screw to deflect so that theaxis of the screw is not absolutely straight. This, of course, greatlyimpairs operability of the screw. Pinions must also be comparativelyshort for practical reasons, including excessive weight in a pinion ofgreater length. Since the amplitude of movement of the slideout room orcompartment can be no greater than the length of the screw or pinion,the amplitude of sliding movement, and hence the amount of additionalspace gained by the slideout compartment, is limited.

Other types of slideout installations for vehicles are also known. Onesuch installation employs an endless cable that passes over one pair ofpulleys supported by a main part of a mobile home and a second pair ofpulleys mounted on side walls of an extension part of the mobile home tocause the extension part to reciprocate. Another slideout installationshows an expanding caravan, which also includes a rotatable shaft andtwo types of cables wound therearound. Rotation of the shaft in onedirection causes one type of cable to wind as the other type unwinds,causing a sliding unit a second module to reciprocate in one direction(say outwardly) relative to first module. Rotation of the shaft in theopposite direction causes the second module to move in the oppositedirection (say inwardly relative to the first module).

A challenge with slideable room assemblies is that a slideout room iscantilevered as it is extended. The outer end of the extended slideoutroom tends to tip downwardly. This puts weight on the slideout unit'soperating mechanism. The cantilevered slideout room also tends to beloose at the top and tight at the bottom. This puts weight on theslideout mechanism, which in turn impairs slideability and also invitesleakage.

Another challenge with presently known slideout units is that theyrequire modification of the vehicle's underframe, unless the slideoutunit is of small size. For example, it may sometimes be necessary to cutaway a portion of the underframe in order to accommodate the operatingmechanism of the slideout unit. This impairs the ability of theunderframe to support the vehicle by lessening the strength and rigidityof the underframe.

SUMMARY OF THE INVENTION

An embodiment of the present invention provides a vehicle slideoutassembly that can be moved between retracted and extended positions witha single motor from any of multiple positions in the slideout assembly.Additional motors may be added, as needed, to handle additional loadcapacity.

An embodiment of this invention provides a series of bevel gearconfigurations at the corners of the slideout assembly to enable evenmovement of the assembly at each corner.

According to this invention, a vehicle is provided with one or morehorizontally reciprocable slideout units. Slideout units according tothis invention can include one or more room slideout units and/or one ormore storage slideout units (or compartments). A vehicle may have eithertype or both types of slideout units, and may have one or more slideoutunits of each type.

The vehicle (motor homes, fifth wheel trailers or travel trailers)comprises a vehicle body having a plurality of exterior walls, at leastone of which has an opening therein. Each slideout unit is disposed inthe vehicle body opening and is slidable between an extended positionand a retracted position. The vehicle body and a slideout unit formrespective first and second relatively reciprocable modules. The drivemechanism is supported by one of the modules and comprises at least onedrive mechanism powering a drive shaft, a plurality of bevel gearslocated at corners of the slideable room assembly, and at least onerack/gear assembly for moving the slideable room assembly betweenextended and retracted positions.

In another embodiment of this invention, a slideout assembly of the typehaving a body with a plurality of exterior walls, at least one of whichhas an opening and a slideout unit disposed in the opening andreciprocable between an extended position and a retracted position,wherein the improvement comprises:

BRIEF DESCRIPTION OF THE DRAWINGS

This invention will now be described with particular reference to theaccompanying drawings, in which:

FIG. 1 is a partial perspective view of a recreational vehicleincorporating slideout units in accordance with the present invention,illustrating the slideout units in the retracted position;

FIG. 2 is a perspective view of a recreational vehicle incorporatingslideout units in accordance with the present invention, illustrating aslideout unit that forms a room extension in the extended position;

FIG. 3 is an isolated perspective view of a recreational vehicle'sslideout unit in accordance with the present invention, illustrating aslideout unit that forms a room extension in the extended position;

FIG. 4 is a perspective view of a slideable room assembly in accordancewith the present invention as viewed from the upper exterior of arecreational vehicle; wherein a slideable room assembly unit forming aroom extension is illustrated in a partially extended position;

FIG. 5 is a perspective view of a slidable room assembly according to afirst embodiment of this invention as viewed from the upper interior ofa recreational vehicle wherein a slideable room assembly unit forming aroom extension is illustrated in a partially extended position;

FIG. 6 is a perspective view of a slidable room assembly according to afirst embodiment of this invention as viewed from the lower exterior ofa recreational vehicle wherein a slideable room assembly unit forming aroom extension is illustrated in a partially extended position;

FIG. 7 is a perspective view of a slidable room assembly according to afirst embodiment of this invention as viewed from the lower interior ofa recreational vehicle wherein a slidable room assembly unit forming aroom extension is illustrated in a partially extended position;

FIG. 8 is an elevational front view of a slidable room assemblyaccording to a first embodiment of this invention as viewed from theexterior of a recreational vehicle;

FIG. 9 is an elevational view of a slidable room assembly according to afirst embodiment of this invention as viewed from the interior of arecreational vehicle;

FIGS. 10 and 11 are elevational views of a slidable room assemblyaccording to a first embodiment of this invention as viewed fromopposing sides of the slidable room assembly;

FIG. 12 is a bottom view of a slidable room assembly according to afirst embodiment of this invention;

FIG. 13 is a top view of a slidable room assembly according to a firstembodiment of this invention;

FIG. 14 is an upper exterior perspective view of top and bottom cornerportions of a slideout unit in accordance with this invention;

FIG. 15 is an interior perspective view of top and bottom cornerportions of a slideout unit in accordance with this invention;

FIG. 16 is a lower exterior perspective view of top and bottom cornerportions of a slideout unit in accordance with this invention;

FIG. 17 is a lower interior perspective view of top and bottom cornerportions of a slideout unit in accordance with this invention;

FIGS. 18, 19, 20, and 21 are further exterior perspective views of topand bottom corner portions of a slideout unit in accordance with thisinvention;

FIGS. 22, 23, 24, and 25 are further interior perspective views of topand bottom corner portions of a slideout unit in accordance with thisinvention;

FIG. 26 is a front view of top and bottom corner portions of a slideoutunit in accordance with this invention;

FIG. 27 is a back view of top and bottom corner portions of a slideoutunit in accordance with this invention;

FIG. 28 is an outer side view of top and bottom corner portions of aslideout unit in accordance with this invention;

FIG. 29 is an inside side view of top and bottom corner portions of aslideout unit in accordance with this invention;

FIG. 30 is an inside side view of top and bottom corner portions of aslideout unit in accordance with this invention, wherein a portion hasbeen cut away to illustrate the internal mechanisms therein;

FIG. 31 is a perspective view of a tooth portion of the rack mechanismused in conjunction with a slideout unit in accordance with thisinvention;

FIG. 32 is a side view of a tooth portion of the rack mechanism used inconjunction with a slideout unit in accordance with this invention;

FIG. 33 is a top view of a tooth portion of the rack mechanism used inconjunction with a slideout unit in accordance with this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to FIGS. 1 through 3, the present invention in oneembodiment relates to a vehicle 20 comprising a vehicle body 22 (or baseunit or first module) having one or more room slideout units (or secondmodules) 24 that is horizontally reciprocable relative to the vehiclebody 22 between a retracted (or first) position shown in FIG. 1 and anextended (or second) position shown in FIGS. 2 and 3. The vehicle 20 canbe a motor home, a fifth wheel trailer or a travel trailer. The slideoutunit 24, when extended, affords more room or space to the interior ofthe vehicle. A novel actuation system or drive mechanism (or forcetransmitting mechanism) to be described later is provided forreciprocation of the slideout unit 24. This first slideout unit (roomslideout unit or space-expanding slideout unit) 24 and the drivemechanism for reciprocating the slideout unit 24 together form aslidable room assembly.

The vehicle 20 may alternatively or further comprise one or morereciprocable storage slideout units 26, which may serve as storagecompartments. This second or storage slideout unit 26, shown in closed(or retracted) position in FIGS. 1 and 2, is shown as disposed in alower portion of a side wall of vehicle body 22. The actuating system ordrive mechanism for reciprocating the storage slideout unit 26 may besimilar to that used to reciprocate room slideout unit 24, but may besmaller and less powerful (since a storage slideout unit 26 is commonlymuch lighter than a room slideout unit 24) and may be positioneddifferently.

A vehicle 20 may have either any number of room slideout units 24, orstorage slideout units 26, or both. Thus, a vehicle 20 may have storageslideout units 26 but no room slideout unit 24 if desired. Also, avehicle may have either slideout units 24 but no storage slideout unit26 if desired.

The vehicle 20 may be a self-powered vehicle, such as a recreationalvehicle, or may be a trailer that is adapted to be towed, e.g. by anautomobile or a truck. The vehicle may be one that is designed forliving (as a house trailer) or may be a work vehicle (e.g. a mobilelibrary).

In any case, a vehicle 20 according to this invention comprises avehicle body 22 having a plurality of exterior walls, e.g., a roof, afront wall, side walls, and a rear wall. The interior of vehicle body 22also has a floor. Beneath the floor is an underframe (not shown) forsupporting the vehicle body 22; the underframe may be conventional. Atleast one of the exterior walls, here shown as the left side wall 30,has an opening 32 therein for receiving the first reciprocable slideoutunit 24. The opening 32 in the left side 30 of vehicle body 22 ispreferably rectangular, as shown, and has a perimeter that includeshorizontal top and bottom edges and vertical side edges. Each of theside walls 30 (only the left side wall is shown) may have a lowerportion or skirt 36, which is disposed below the floor of vehicle 20 andwhich terminates in a lower edge 37. One or both side walls 30 may havean opening 38, which is preferably rectangular, for receiving a storageslideout 26. There may be any number of such openings 38 equal to thenumber of storage slideout units 26. These openings 38 may be in anylocation. Opening 38 preferably extends to the lower edge 37 of the sidewall 30.

Both slideout units 24 and 26 should always be retracted, as shown inFIG. 1, when the vehicle is in motion. When the vehicle is parked orstationary, the room slideout unit 24 may be slid to the extendedposition shown in FIGS. 2 and 3, to afford additional room in theinterior of the vehicle. Similarly the storage slideout unit 26 may beopened (i.e., moved to extended position) when the vehicle is at rest.

The room slideout unit 24 generally has the same cross-sectional shapeas the opening 32 in the vehicle body 22, i.e., rectangular in theembodiment shown. The slide out unit 24 may comprise a floor 40, aceiling 42, left and right side walls 44 and 46, respectively (as seenfrom the exterior of vehicle 20 looking in), and a forward or outsidewall 48. For convenience and further reference only, slideout unitcorners are referenced using letters A, B, C, and D, as further shown inFIGS. 3 and 4. The forward or outside wall 48 of the slideout unit 24 issubstantially coincident with (and spaced slightly outwardly from) theleft side wall 30 of the vehicle body 22 when the slideout unit 24 isretracted (FIG. 1), and is parallel to and spaced outwardly from thevehicle body side wall 30 when the slideout unit 24 is extended (FIG.2). As described, the right side wall 46 of the slideout unit 24 isdisposed in a rearward direction of the vehicle body 22, and the leftside wall 44 of the slideout unit 24 is disposed in a forward directionof the vehicle body. The spacing between opposite side walls 44 and 46is just slightly less than the width of the opening 32 in the vehiclebody 22, to afford enough clearance for sliding movement of the slideoutunit 24 while minimizing the intrusion of the elements such as wind andrain. The size of the forward or outer wall 48 can be just slightlygreater than the size of the vehicle body opening 32. In this manner,the edges of the forward wall 48 overlie the vehicle body 22 as an aidin maintaining a good seal when the slideout unit is retracted. Seals(not shown) extending around the perimeter of opening 22 may beprovided.

The room slideout unit 24 may be provided with windows in the forwardand side walls, as shown, particularly when the vehicle is used as arecreational vehicle or house trailer.

Opening and closing movements of either the first or second slideoutunits or compartments 24 and 26 can be accomplished with a power assist,as will be described later. In certain embodiments (i.e., when manualoperation or servicing is desired), handles 50 may be provided on thefront wall of the slideout unit 24, so that the slideout unit can beopened and closed manually. A lock 52 for room slideout unit 24 may beprovided. Such lock may be provided in addition to the functioning ofthe drive mechanism that locks the slideout unit 24 in position when itis at rest (whether retracted, extended or in between). Similarly, thestorage slideout unit 26 may be provided with a handle 54 for manualoperation and a lock 56.

One or more than one space-expanding slideout unit 24 may be provided ina vehicle 20 in accordance with this invention. A horizontallyreciprocable room slideout unit 24 may be provided in any of theexterior walls of vehicle 20, e.g. the left side wall 30 as shown, theright side wall, and/or the rear wall of vehicle 20. Also in accordancewith this invention, one may provide a vertically reciprocable slideoutunit in order to expand interior space in a vertical direction. Thedrive mechanism in all cases may be as described in the figures.

In all embodiments, force is transmitted evenly to upper and lowerportions and to both sides of the slideout unit, resulting in smooth,even application of force, so that the slideout unit reciprocatessmoothly along its predetermined axis and in a predetermined plane withno tendency to twist or bind, and with minimum power input required,considering the appreciable weight of a typical slideout unit for avehicle.

The force transmission systems (or drive mechanisms) illustrated hereinare shown as on-board systems, which are shown as mounted on theslideout unit 24. By mounting the entire drive mechanism on the slideoutunit 24, and not on fixed frame 34 or any other member that is part ofthe vehicle body 22, one can manufacture the slideout unit 24 and itsdrive mechanism as a modular unit and ship the modular unit to anothersite for assembly with or installation in a vehicle body 22 having aslideout opening 32 of the required size. However, drive mechanismsprovided independent of the slideout unit and requires connection to theslideout unit upon installation are contemplated. Drive mechanism 73 isshown as attached to a bottom frame member via motor bracket 76. Drivemechanisms which are either a self-locking worm drive or a planetarygear motor with an electric brake are two types qualified for use withthis invention. As will be explained in more detail later herein, drivemechanism can be operatively installed at any position around theslideout frame 60. This can be desirable to mask the drive mechanismfrom view, depending on the exact configuration of the vehicle and/orslideout unit. Chain 71 or direct drive units are appropriate for useherewith.

Referring now to FIGS. 4 and 5, a slideout unit frame 60 is shown ashaving four (4) corner members 62 a-d connected by mid-frame members 68.Slideout unit frame 60 is attached at the periphery of the opening insaid vehicle body. Corner members 62 a-d must be of sufficient strengthto support the slideout unit and the drive mechanism componentscontained therein and attached thereon. In one embodiment corner membersare cast out of metal, including aluminum, but are also contemplated asbeing made of component parts attached by conventional means such aswelding or bolting onto a bracket body. For ease of manufacturing,opposing corner members when cast, can be of a single casting. In otherwords cast corner members for corners A and D can be of one castingconfiguration, and corner members B and C of another castingconfiguration. Mid-frame members 68 may be made of a metal or plasticmaterial or any material which substantially maintains its shape.Aluminum, due to its light weight and structural strength is onequalified material. Mid-frame members 68 serve to protect the driveshaft and auxiliary shafts, but one or more such members may be omittedif desired.

A plurality of roller assemblies 120 (see at least FIGS. 4, 5, 6, and 8)may be provided for smooth reciprocation of slideout unit 24 relative tovehicle body 22. These roller assemblies 120 may include one or morerollers which engage the underside of slideout unit floor 40 and whichare freely rotatably mounted in a mounting bracket affixed to a cornermember 62 a-d or mid-frame member 68. If desired, the mounting of rollerassemblies 120 can be rotatably mounted in mounting brackets on thevehicle and engage the floor of which body 22 in rolling relationship.In either case, the roller assemblies may be located close to side edgesof slideout unit floor 40. The number, position, and size of rollerassemblies may be varied without deviating from the intention of theirpurpose in the present invention. The roller assemblies 120 furnishsufficient support for the weight of the slideout unit 24.

Sprocket 70 is shown by example as located in a lower portion ofslideout unit 24 just below the floor 40, as best seen at least in FIGS.4 and 5. Sprocket 70 is mounted on a drive shaft 72 for rotationtherewith. Drive shaft 72 extends along the length of one side of frame60 of slideout unit 24. Drive shaft 72 may be driven by an electricmotor 73. Alternatively, a portable motor (which is connected to driveshaft 72 only when the slideout unit 24 is to be moved) or a hand crank(which may be connected to drive shaft 72), may be used instead of anelectric motor 73. Whatever form of power input is used, it is advisableto lock the slideout unit in position when it is not in motion. Whenused, a worm drive performs a locking function when the slideout unit 24is at rest, locking the slideout unit 24 in place (in closed positionwhen fully retracted, for example), so that a separate lock is notnecessary. With other drive mechanisms, locking means (e.g., a cam lock,or clamp in the walls of slideout unit 24) may be used to retain theslideout unit 24 in position. The rotating axis of drive shaft 72 ismaintained by two or more bushings 74 located on corner members 62 ormid frame members 68. Drive shaft 72 terminates into and rotates a firstgear of a bevel gear set 80 located at each corner of slideout frame 60on either side of motor 73 and as shown in at least FIGS. 10-12, 15, 17,20, 24 and 28).

Looking at FIGS. 5, 7, 10, and 11, first bevel gears 81 in corners C andD are driven by drive shaft 72. Second bevel gears 82 in corners C and Dare rotatably engaged by the first bevel gear 81 in these corners, andredirects the rotational energy of the drive shaft 72. Second bevelgears 82 in corners C and D in turn rotate auxiliary shafts 90 (in thisillustration auxiliary shafts run between corners C-A and D-B).Similarly, there are auxiliary or timing shaft(s) 90 operativelyconnected to spur or drive gears 94 capable of driving rack gear sets100 along side A-B when connected to bevel gear sets 80 located incorners A and B, such that bevel gear 84 accepts rotation by bevel gear83 connected to an auxiliary shaft 90. Such a configuration may exist asa single auxiliary shaft running between bevel gear sets 83/84 atcorners A and B (not shown) or as separate shafts which terminate atspur gears 94 in the vicinity of corners A and B as apparent in at leastFIG. 7 and FIGS. 17-27. Spur gears 94 located on drive shaft 72similarly move rack gear sets 100 along a defined linear path.

Rotation of drive shaft 72 and auxiliary drive shafts 90, through bevelgear sets 80, serve to move the slide out room assembly betweenretracted and extended positions when rotating drive gears 94 engagingrack gear assemblies 100 attached to the slide out room assembly,thereby translating the rotational motion of the motor 73, via shafts,bevel gears, and drive gears into linear motion. This is illustratedclearly in at least FIGS. 8 and 9.

The present illustration shows four rack gear units 100, with twopositioned on the top of the slideout unit and two on the bottom ofslideout unit, as will be discussed in more detail later herein.However, it is to be appreciated that while a minimum number rack gearsets for utilization in the present invention is two, any number inexcess of two may be utilized. As it relates to orientation of rack gearsets 100, multiple orientations are possible, provided that at least onedrive gear 94/rack gear assembly 100 is provided on at least each of twoopposing sides of a slideout unit, even if the number on such opposingsides is not equal. The length of rack gear units 100 will define theamount of travel capable from the slideout unit 24, but the width andtooth count of rack gear is subject to preference. Drive gears 94 fordriving cooperating rack gear assemblies 100 may be located on eitherdrive 72 or auxiliary shafts 90.

Rack gears 102 used herein are similar to those known in the art areshown in FIGS. 31-33. As shown, the rack gears 102 are machined ormolded and may be produced as a single unit or comprised of sections,such as 8 to 10-inch sections which can be linked together by meansknown in the art. FIG. 33 illustrates a dovetail fit which satisfiesthis requirement. A rack housing 110 serves to hold the rack gear 102 orrack gear sections therein by means well known in the art and mayprovide additive structural integrity thereto. An example is shown inFIG. 26 wherein rack gear 102 is retained within a track formed inhousing 110 and/or crimped therein by the application of force.Conventional means of attachment such as rivets, bolts, adhesive and thelike are contemplated. One qualified housing 110 is that extruded fromaluminum or plastic. Molded rack gears 102 or gear sections arecontemplated. Holes in rack gears 102 can be used as desired and asappropriate to make attachment of the rack gear 102 to the rack housing110 or to the roof or floor in the present embodiment (alternativelyopposing sides) of the slideout unit 24. Brackets 106 are used to attachopposite ends of rack gear assembly 100 to the slideout unit 24 (see atleast FIGS. 4-7, 10-13). As perhaps best illustrated in FIG. 10, afloating bracket 106 which captures the terminal end of a rack gearassembly 100, but allows the terminal end of the assembly to travel upand down within the bracket 106 is a good but not required choice duevariables such as taper in the slideout unit or the angle of theslideout unit's travel. Fixed brackets 106 which restrict travel withinthe bracket are also contemplated and may be desired especially inconfigurations with rack gear assemblies 100 positioned along the floorof a slideout unit 24. Any combination of fixed or floating brackets maybe used.

Now in looking at FIGS. 14-27, it can be seen the rack guides 130capture the rack gear housing 110 via side flanges 111 to facilitate andmaintain the interface between drive gears 94 and the rack gear assembly100. It can be appreciated that numerous ways in which to accomplishsuch interface are known and the invention shall not be restricted tothe manner shown herein. Rack guides 130 may contain inserts 132 toallow a snug but not tight fit and facilitate smooth movement of theassembly within guides 130. Suitable inserts 132 may be a low frictionmaterial, such a plastic or silicon-coated material. As can be seen inthese same figures, attached to corner members 62 a-d are optional wipemembers 140 which fill the space between the room and the jamb, and arealso in mild contact with the side, bottom, or top of the slideable unit24 to remove moisture or debris (such wipe members 140 can be located onthe inside, outside, or both sides of corner members 62 and/or mid-framemembers 68. In certain instances, it may be preferable not to installwipe members 140 along the outside of bottom corner members 62 c and 62d, in an effort to avoid accumulation of debris or moisture within thejamb of the slideout frame 60. Wipe members 140 capable of achieving thestated purpose may take many forms including a unitary piece of materialor a multi-piece construction, with or without removable or replaceableinterfaces with the adjacent surface.

In certain environments, it may be desirable to protect the rackassemblies from dirt, debris, and/or moisture especially, but notexclusively, rack assemblies mounted to the ceiling or upper surface ofslideout units. To this end, a protective surface 150 may be utilized tocover vulnerable portions of rack assemblies 100, as illustrated inFIGS. 28-30. Now as best viewed in FIGS. 20-21, 24-27, the protectivesurface 150 may be a thin membrane or sleeve which travels along anyportion of rack assembly 100 that may be subject to the accumulation ofunwanted material. However, it is appropriate that the protectivesurface 150 not enter the engagement between a drive gear 94 and a rackgear 102. Thus, a router 152 is employed to channel protective surface150 around such a gear engagement. FIG. 30 illustrates the router 152and a series of travelers 154 therein which help to move the protectivesurface 150 away from the drive gear/rack gear engagement as theslideout unit 24 is moved between retracted and extended positions.Alternatively, protective surface 150 could be collected and dispensedvia an arrangement of one or more spools in which such spools are biasedtake up excess slack as the rack assembly moves.

A limit stop may be provided to limit outward movement of the slideoutunit 24.

Operation of an apparatus according to one embodiment of this inventionwill now be described with reference to all of the FIGS.

When it is desired to move slideout unit 24 from the first or retractedposition shown in FIG. 1 to the second or extended position shown inFIG. 2, motor 73 is started by means of a switch (not shown) and iscaused to turn in one direction. Motor 73 drives sprocket 70, which inturn drives drive shaft 72. This causes drive gears 94 in directconnection with drive shaft 72 to rotate and move their associated rackassemblies 100 along a linear path. The rotational energy of motor 73 isfurther translated to sets of bevel gears 80 located in the corner areasof the frame proximal to and on either side of the motor 73. Thisrotational energy is further translated to auxiliary or timing shafts 90extending away from these bevel gears 80 to additional sets of bevelgears 80 located distal to motor 73 and further to additional timingshafts 91 (or a single timing shaft) to power drive gears 94 causingmovement of associated rack assemblies 100. Note that motor 73 accordingthe present invention may be positioned at any point along the pathwayof shafts and bevel gears, even though by example only motor 73 is shownas located below the slideout unit, and centered relative to adjacentcorner members. This system of bevel gears 80 and drive/timing shafts72/90/91 allows the movement of each drive gear 94/rack assembly 100 tobe synchronized or timed with other drive gear 94/rack assemblies 100located on the same slideout unit. Further, additional motors may beadded to this assembly in a manner similar to motor 73 and in order toassist with load of the slideout unit 24 without affecting the operationthereof. The interconnection between drive shaft(s), auxiliary shafts90/91 and bevel gear sets 80 allows the slideout unit 24 to move inunison throughout all corners of unit 24.

In an alternate embodiment (not shown), the motor 73 is not provided andthe slideout unit is only manually driven. This would be used where theslideout unit 24 is a storage unit 26. For such manually driven units,an adapter or handle could be provided on sprocket 70 to permit manualrotation of sprocket 70 to reciprocate the storage unit 26 or thestorage unit could be manually moved by means of handles 50, 54.

The present invention affords a simple and reliable drive mechanism fora vehicle slideout unit. This drive mechanism is simpler and morereliable than vehicle slideout drive systems that are presently known.The drive mechanism of the present invention assures that the slideoutunit will advance and retract smoothly and evenly, whether power isapplied manually or with a motor. Because of the simplicity of thepresent drive mechanism, there is less that can go wrong than is thecase with presently known vehicle slideout operating systems.

These and other advantages are obtained in assemblies according to thisinvention.

While the present invention has been described with particular referenceto a vehicle, it will be seen that this invention is also applicable toother structures. Such structures may comprise a base unit (or firstmodule) and a slidable unit (or second module) that is reciprocable inan opening in a wall of the base unit between first and second positionsrelative to the base unit. For example, this invention may be applied toa cabinet having a wall with one or more openings and comprising one ormore drawers, each of that is slidably mounted in such opening and ismoveable in a reciprocating manner between a closed position and an openposition. In general, this invention is particularly useful for themovement of reciprocating members having substantial weight as, forexample, a slideout unit of an automotive vehicle.

While this invention has been described in detail with respect tospecific embodiments thereof, it shall be understood that suchdescription is by way of illustration and not by way of limitation.

Various modifications can be made without departing from the scope andspirit of this invention.

What is claimed is:
 1. A slidable room assembly in a vehicle body, thevehicle body having a plurality of exterior walls, at least one of whichhas an opening and a slideout unit disposed in the opening andreciprocable between an extended position and a retracted position, theslidable room assembly comprising: a slideout unit frame insertable intosaid opening; a drive shaft; a means for rotation of said drive shaft; aplurality of first bevel gear sets connected to said drive shaft andadapted to redirect the rotational motion of said drive shaft; aplurality of first auxiliary shafts operatively connected to said firstbevel gear set for rotation thereby; one or more second set of bevelgears each connected to an auxiliary shaft, adapted to redirect therotational motion of said drive shaft; one or more second auxiliaryshafts operatively connected to said one or more second set of bevelgears for rotation thereby; a plurality of drive gears located on eithersaid drive shaft or said auxiliary shafts and a rack gear assemblyassociated with each drive gear, for linear movement of said slideoutunit frame relative to the opening; and wherein the at least one firstdrive gear and the at least one second drive gear include a pair ofdrive gears spaced horizontally from each other; and wherein the firstrack assembly includes a pair of rack gears aligned with the pair ofdrive gears of the at least one first drive gear and a the second rackassembly includes a pair of rack gears aligned with the pair of drivegears of the at least one second drive gear.
 2. The slidable roomassembly of claim 1, wherein each rack assembly includes plural racksections coupled to each other.
 3. The slidable room assembly of claim2, wherein the rack sections are coupled to each other with a dove-tailjoint.